I may look like an idiot asking this..

I have heard sooo many different stories about ITR engine specs. so im just going to ask the questions to you guys...

What is the history on the B18c? I understand that there is a 98 usdm itr and i guess a 99+ usdm itr.
Is the jdm 98 B18c specs diff than the usdm b18 specs. and so forth for the 99+.
I would just like to find a specifications chart of the entire engine for ALL the usdm itr engines and ALL the jdm engines. Maybe im not looking in the rights places, sorry if thats the case..
By the way i realize this isnt the best place to post this but ive talked to alot of inteligent people on here. Plus I have a B18c in my EF

Thanks in advance

 

You can find this info easy if you just search... But theirs a lot thats different like the headers, cams, pistons, and the gearing of the tranny

 

Assuming we are talking only about Type R B18C.....here is the info best as i can remember it:

- In Japan, the very 1st ITR B18C came out and had a compression ratio of 11.0:1 and made about 200hp. The tranny had the LSD and a 4.4FD

- In the US, we got our 1st B18C5 in 1997 and had a compression ratio of 10.6:1 and made 195hp. The tranny was the same as the jdm one with a 4.4FD and LSD

- In 1998, Japan still had the same engine, but got a tranny upgrade with a 4.7 final drive for faster acceleration

- 1999-01 USDM and JDM B18C Type R engines got better intake cam, same as the the jdm CTR B16B. They also got a tubular exhaust manifold for better performance. The JDM version had a slightly different valve cover with an H and Honda Motor Company on it, a chrome oil cap, and a fake carbon fiber spark plug cover


That should cover most of it. I know there was some slight differences with gear ratio's between models

Here's a shot of the late model JDM B18C

 

USDM Type R exhaust manifolds are like the USDM stock GS-R but with a Type R down pipe. The US Type R down pipe and front of cat are 2.25 vs 2.5 for the JDM Type R. The US Type R down pipe is identical to the JDM down pipe upto the front 02 sensor at that point it necks down to the same size as a basic GSR down pipe. So the last transition 2 to 1 is Type R smooth, but soon after it gets really small.

1996-87 JDM Type R's manifold is massive and long and the cast tubes are in pairs that join only at the flanges, it is the SAME manifold as the JDM GSR.

Note that outside of the better JDM GS-R / Type R exhaust manifold, the rest of the JDM exhaust is more hype. For instance the 2.5 exit on the JDM well just after the JDM cat it is the same 57mm B pipe and all Type R have the same ultra small B pipe to rear muffler transition and the inlet to the rear Futaba 1028 Type R muffler is like 2" OD!!!! Sure exhaust gas loose a lot of heat and energy before the rear muffler but 2" OD...

As a side note UK Type R run a 4 to 2 tubular exhaust manifold, twin walled like all other Honda tubular manifolds and it probably is really really small internally. Same down pipe as USDM type R.

US Type R VTEC is 5700, fuel cut at 8500 rpm, peak HP at 7800 RPM. JDM Type R has VTEC at 5700 RPM, fuelcut at 8600 RPM (8700 RPM for euro Type R) and peak HP at 6000 RPM. DIN HP is about 1.3% less then US SAE net so the JDM Typr R puts out 197 US SAE HP.

JDM 5th changed so that overall gear ratio in the top final geas remaind close to the same spec as the 96 -97.


4 to 1 header added, sorry but it is a header there is nothing "manifold" about it (unless you are in the UK where everything is called a "manifold". mid range torque went up peak torque was 132 ish at 6200 RPM. Shows to go ya that 4 to 1 headers of some length and small tube size can add to mid range. Peak HP was unchanged but there was much more power under the curve. This change and the close 1, 2, 3 rd must have made this a near optimal package.

 

also the USDM Type R bolted to the same size cat and B pipe as the other 1998 so it was really small ID, like 1.80 at the end of a neckdown on the A pipe just after the 02, and the end of the cat and at the start of the B pipe, it then flared back up to about 2.0 ID and then to the 57mm OD ITR size.

 

I stopped reading after that.

 

X2 obviously just throwing something in

 

LOL, SERIOUSLY? fuelcut at 6500 and 6600 rpms? So, what the motor gets no fuel all the way up to the 8400 redline? C'Mon SON!

 

haha..

 

alright, this has been an arguemant between my friends and i so we decicded to test it out on forza3 and the usdm itr won by have a car 5/5 times despite all the rumors of the itr "better" specs. idk if our experiment was legit; but it sure shut up the "jdm" lovers lol

 

I have both manifolds so maybe you should keep reading.

 

fixed it gee sorry let me know when you write war and peace....